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cam seal replacement

Discussion in 'Technical Q&A' started by blainewest, Apr 21, 2006.

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  1. blainewest

    blainewest Formula Junior

    Aug 26, 2005
    729
    Kelowna, BC
    Full Name:
    Blaine W
    #1 blainewest, Apr 21, 2006
    I'm in the middle of changing my t-belts on my 75 gt4 and I've decided to replace the cam seals while I'm at it even though they look ok (one might be weeping slightly) they are nearly 10 years old.

    My question is can the cam seals be replaced from the pulley side (with cam pulleys and valve covers off of course) and the camshafts in situ? Or must the cams come out?
     
  2. Owens84QV

    Owens84QV F1 Rookie

    Oct 2, 2001
    4,486
    Somewhere in NC
    Full Name:
    Greg
    #2 Owens84QV, Apr 21, 2006
    At a minimum IIRC, the cams must be lifted on the sprocket end to pull the old seal and replace with a new, at least on a QV.
     
  3. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    7,021
    Groton, MA
    Full Name:
    Verell Boaen
    #3 Verell, Apr 21, 2006
    Yes, on a 2V, the cam seals can theoreticly be changed w/o even pulling the valve covers. Would take a bit of finesse to remove the old ones & keep from nicking the mating cam surface. Would need a metal ring to press the new ones in place w/o bending them. Then you have to make absolutely certain you re-pin the cam gears in the same cam & cam gear holes.....

    On a 4V, the cam seals are mounted in a housing ring that's retained with a large o-ring. While the seals hypotheticly could be changed like on a 2V, the o-ring would be as old as the seals & would have had a bit of yanking around while the seal was being changed. The o-rings are often leaking before the seals do. Not worth trying on a 4V.
     
  4. Bend GT4

    Bend GT4 Rookie

    Aug 13, 2008
    3
    Bend Oregon
    Full Name:
    Leonard P
    #4 Bend GT4, Aug 13, 2008
    Several years ago I found a site that had very good instructions on how to change the seals and belts on my 75 308GT4 but have lost the site anyone know where to find good instructions to do this I will also be replacing the engine mounts as the engine is sagging
    Thanks
    Leonard
     

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